OSDI (Ocular Surface Disease Index)
The Ocular Surface Disease Index (OSDI; Schiffman and colleagues 2000), a 12-item PATIENT-REPORTED measure of dry-eye symptoms over THE LAST WEEK, in three sections.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Item 1
- 2
- Item 2
- 2
- Item 3
- 2
- Item 4
- 2
- Item 5
- 2
- Item 6
- 2
- Item 7
- 2
- Item 8
- 2
- Item 9
- 2
- Item 10
- 2
The other 2 values
- Item 11
- 2
- Item 12
- 2
Result: OSDI 50 of 100: severe.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0 to under 13
- Normal.
- 13 to under 23
- Mild.
- 23 to under 33
- Moderate.
- 33 or above
- Severe.
- Why intervals
- The integer rendering (0-12, 13-22, 23-32) leaves 12.5 or 22.7 in no band, and such scores are ordinary.
- N/A
- Items 6-12 only. Items 1-5 are always answerable, so the divisor never falls below 5.
- Scope
- Symptoms only. Diagnosis needs an objective sign too; symptoms and signs correlate poorly.
What you enter
- Item 1.
- Item 2.
- Item 3.
- Item 4.
- Item 5.
- Item 6.
- Item 7.
- Item 8.
- Item 9.
- Item 10.
The other 2 fields
- Item 1. Light sensitivity [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time. This item does NOT accept "not applicable"]
- Item 2. Gritty feeling [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time. This item does NOT accept "not applicable"]
- Item 3. Pain or soreness [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time. This item does NOT accept "not applicable"]
- Item 4. Blurred vision [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time. This item does NOT accept "not applicable"]
- Item 5. Poor vision [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time. This item does NOT accept "not applicable"]
- Item 6. Reading [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time; na = not applicable, EXCLUDED from both the sum and the count]
- Item 7. Driving at night [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time; na = not applicable, EXCLUDED from both the sum and the count]
- Item 8. Screen work [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time; na = not applicable, EXCLUDED from both the sum and the count]
- Item 9. Watching TV [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time; na = not applicable, EXCLUDED from both the sum and the count]
- Item 10. Wind [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time; na = not applicable, EXCLUDED from both the sum and the count]
- Item 11. Dry air [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time; na = not applicable, EXCLUDED from both the sum and the count]
- Item 12. Air conditioning [4 = All of the time; 3 = Most of the time; 2 = Half of the time; 1 = Some of the time; 0 = None of the time; na = not applicable, EXCLUDED from both the sum and the count]
How this is calculated
- Formula
- (sum of scores) x 25 / (number of questions ANSWERED). Range 0 to 100, higher is worse.
- Denominator
- VARIABLE. "Not applicable" is excluded from BOTH sum and count, so the score is usually fractional.
Schiffman RM, Christianson MD, Jacobsen G, Hirsch JD, Reis BL. Reliability and validity of the Ocular Surface Disease Index. Arch Ophthalmol. 2000;118(5):615-621. Instrument copyright 1995, Allergan. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.